| 摘要 |
Tennis and racquetball players use practice swings to warm up much the same as baseball players swing several bats just before going to bat. The present invention allows a common racquet cover to function as a warm up aid by providing balanced weight holding pockets on the face of the cover. Variable weights are placed symmetrically around the center line of the cover to provide constant rotational torque resistance during a practice swing. Interchangeable weights can simulate the weight of the playing ball. Thus, all levels of players can practice their shots just before playing ball.
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